ICD-10 Code I70.502 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.502 – Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities, left leg
What it is
This code identifies atherosclerotic narrowing or blockage in a nonautologous biological bypass graft in the left leg. It is used when the graft is affected, but the documentation does not specify more detail.
Clinical signs
Clinical features vary; refer to documentation. Findings may include reduced leg perfusion, claudication, ischemic pain, or diminished pulses, but the record should support graft involvement in the left leg.
When to use this code
Use this code when the provider documents atherosclerosis involving a nonautologous biological bypass graft in the left lower extremity and does not specify the type or severity further. It also fits cases where the graft is the documented site of disease, not the native artery. Check documentation if laterality or graft type is unclear.
Do not use for
Do not use this code for atherosclerosis of native arteries, other extremities, or bypass grafts that are not biological or not nonautologous. If the record identifies a different site or more specific graft problem, code that instead.
Coding tip
Verify the graft type and left-leg laterality in the operative or vascular note before assigning I70.502.